dry eye disease - science truth · mechanism of dry eye disease • hyperosmolarity is common...
TRANSCRIPT
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Dry eye disease:
A tear film and ocular surface
challenge
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David A. Sullivan
Schepens Eye Research Institute
Harvard Medical School
Boston, MA, USA
Disclosures: Singularis & TearLab
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Acknowledgments
Benjamin Sullivan Francoise Brignole
Tannin Schmidt Simon Chandler
Stephen Richards Jean-Frédéric Chibret
Shaohui Liu Stephen From
Erich Knop Kamran Hosseini
Nadja Knop Ryo Kubota
Afsun Sahin Alessandro Lambiase
Raheleh R Darabad Xavier Mariette
Edward Truitt Masatsugu Nakamura
Matthew Warman Charles Semba
NIH grant R01EY05612
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Assignment
• Review the definition, impact, classification, mechanism & risk factors of dry eye disease
• Highlight the new therapeutic approaches and challenges for the treatment of dry eye disease
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“Dry eye is a multifactorial disease of the
tears and ocular surface that results in
symptoms of discomfort, visual disturbance,
and tear film instability with potential
damage to the ocular surface. It is
accompanied by increased osmolarity of the tear film and inflammation of the ocular surface.”is”
TFOS DEWS, 2007
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Dry Eye Disease
• Afflicts > 40 million people in USA
• Leading cause of patient visits to eye care practitioners
• Has no cure
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Debra A Schaumberg
2010
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Dry eye disease:
Risk factors
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Debra A Schaumberg
2010
Source: http://www.science-truth.com
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Debra A Schaumberg
2010
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Debra A Schaumberg
2010
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Additional risk factors for DED
• Androgen deficiency
• Estrogen replacement
therapy
• Benign prostatic hyper-
plasia & associated
medications
• Hypertension
• Antidepressant medications
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Dry eye disease:
Quality of life
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Dry eye & quality of life
• Impact of moderate to severe dry eye is comp-
arable to dialysis and severe angina
• DED leads to problems with reading, computer
use & work performance, and is associated with
role limitations, lower vitality & poorer general
health
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Dry eye disease:
Approved treatments
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Topical Restasis
“Restasis is indicated to increase tear production
in patients whose tear production is presumed to
be suppressed due to ocular inflammation
associated with keratoconjunctivitis sicca.”
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Restasis sales in 2010: > $700 million
“… statistically significant increases in Schirmerwetting of 10 mm versus vehicle…effect was seen in ~ 15% of RESTASIS® ophthalmic emulsion treated patients versus ~ 5% of vehicle treated patients.”
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Dry eye disease:
Potential treatments
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Treatment Targets
Mucin deficiency
Aqueous tear deficiency
Lipid deficiency
Ocular surface damage
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New therapeutic approaches for the
treatment of mucin deficiency
• Trefoil factor family peptide 3 (TFMP3)
• Mycophenolate mofetil
• Nerve growth factor & mimetic
• Diquafasol
• Gefarnate
• Eupatilin
• Rebamipide
• Galectin 3
• Tamarind seed
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Stimulation of ocular surface mucins
• Mycophenolate mofetil –
↑ MUC5AC in human conjunctiva
• DA-6034 (Eupatilin) – ↑MUCs 1, 2, 4, 5AC, 5B &
16 in human conjunctiva
• Rebamipide – causes
mucus secretion (activates
cyclooxygenase 2)
• TFMP3 – stabilizes
mucous layer Gipson IK, IOVS 2007;48:4391-4398
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Nerve growth factor & mimetic
� ↑ Goblet cell number & MUC 5AC production
� ↑ Corneal sensitivity
• Promotes corneal
epithelial cell wound
healing
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New approaches for the treatment of
aqueous tear deficiency
Immunomodulation
Lacrimal gland stimulation
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Webrheum.bham.uk/staff/mikessalmon/immune.htm
Immunomodulation
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Lacrimal Gland Stimulants
• TRPV1 receptor modulators
• Taste & salivation
• Anethol trithione
• Uridine
• Hydroxychloroquine
• Vitamin A
• Muscarinic receptor agonists
• Topical androgens
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Transient receptor potential vanilloid
1 (TRPV1) receptor modulator
Intranasal application of
Civamide, a TRPV1
receptor modulator,
reportedly increases tear
production. TRPV1 is a
permeable, non-selective
cation channel.
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Increased Schirmer Wetting Score
• Oral anethole triothine – a cholagogue
• Oral uridine – metabolized
into P2Y2 agonist
• Oral hydroxychloroquine –
in Sjögren’s syndrome
patients with α-fodrin
antibodies
• Vitamin A – retinyl
palmitate eye drops
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Muscarinic Receptor Agonists
Salagen (M3 agonist,
oral pilocarpine)
Cevimeline (M1/M3
agonist)
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Oral Pilocarpine and Cevimeline
Sjögren’s Syndrome:
Beneficial effect on subjective eye symptoms
No effect on tear volume
Pilocarpus pennatifolius
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New approaches for the treatment of
lipid deficiency
LipiFlow & Maskin Intraductal Probe
Azithromycin & IL-1Ra
Topical androgens
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Treatment of Meibomian Gland Duct
Obstruction
TearScience LipiFlow
Maskin Intraductal
Probe
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Treatment of Posterior Blepharitis
Azithromycin
(Azasite, Azyter)
Interleukin-1 receptor
antagonist
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TFOS MGD Report, 2010
Topical androgens: Treatment of
meibomian gland dysfunction
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Treatment of Ocular Surface Damage
Immunomodulation
Hydration
Boundary Lubrication
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Immunomodulation
Omega 3 fatty acids & nutritional foods
Glucocorticoids
NSAIDs
Calcineurin inhibitors
Antibodies & other drugs
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Omega 3 fatty acids & nutritional foods
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Glucocorticoids
• EGP-437 – EyeGate
Pharma, dexamethasone &
transscleral iontophoresis
• Mapracorat – B&L,
selective glucocorticoid
receptor agonist
• DE-110 – Santen, selective
glucocorticoid receptor
agonist
• Lotemax – B&L
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Possible glucocorticoid side effects
Ocular side effects have included blurred vision, discharge, ocular
pain and discomfort, increased intraocular pressure, foreign body
sensation, pruritus, and hyperemia in 1% to 5% of patients.
Dry eye, tearing, conjunctival and corneal edema, keratitis,
photophobia, corneal erosion, corneal ulcer, corneal staining,
increased fibrin, tearing, photophobia, edema, irritation, browache, lid
margin crusting, and infiltrate have been reported in less than 1% of
patients.
In addition, prolonged use of topical ophthalmic corticosteroids has
caused ocular hypertension/glaucoma, optic nerve damage, defects in
visual acuity and fields of vision, posterior subcapsular cataract
formation, and secondary infections of the eye. The use of topical
corticosteroids has caused perforation of the globe where there is
preexisting thinning of the cornea or sclera.
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Non-steroidal anti-inflammatory drugs
Remura (ISTA Pharmaceuticals) & ISV-101 (InSite Vision) – bromfenac, thought to
inhibit cyclooxygenases 1 & 2
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Calcineurin inhibitors
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Additional formulations
Novagali – Cyclokat, a cyclosporine
LuxBio – LX214, a voclosporine
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Antibodies• AIN457 (Novartis) –
neutralizes IL-17A
• ESBA105 (Alcon) –
fragment against TNF-α
• Belimumab (GSK) –
human monoclonal
inhibits B cell
activation factor
• Rituximab (Biogen) –
murine/human anti-
CD20 monoclonal
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Other anti-inflammatory drugs
CF-101 (CAN-FITE) – oral
adenosine3 receptor agonist,
induces inflammatory cell
apoptosis
RGN259 (Regenerx) – topical
thymosin β4
Perceiva (MacuSight) –
sirolimus, subconjunctival
injection, inhibits response to IL-
2
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Resolvins
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Other anti-inflammatory compounds
• Rivoglitazone (Santen) – binds to PPARs
• Cilomilast (Alcon) – phosphodiesterase 4 inhibitor
• DA-6034 (Dong-A) – inhibits NF-κB activation
• Chitosan-N-acetylcysteine conjugate – thiolated polymer,
suppresses inflammation, no effect on corneal staining
• Tranilast – inhibits lipid mediator and cytokine release
• N-acetyl aspartyl glutamic acid – neuropeptide
• Astaxanthin – oral carotenoid
• Curcumin - natural polyphenol extracted from turmeric
• Catechins – from green tea
• KLS-0611 & KCT-0809 (Kissei) - treat surface damage
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Hydration
Oral sea buckthorn oil –
reduces tear osmolarity
Lancutovide (Lantibio) –
promotes hydration
Alpha eye dry eye relief
mask – moisture barrier
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Boundary Lubrication
Lubricin -
•Protects against shear stress
•Addresses central causative mechanism (i.e. shear
stress) of ocular surface damage in dry eye disease
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Virtual kaleidoscope of potential
treatments for dry eye disease
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Common signs and symptoms of
dry eye disease do not correlate
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Confidential 56
Clinical Challenges in Dry Eye Therapeutics
• Existing treatments fail to address causative mechanisms
– Inflammation is low gain, peripheral to central loop
• Difficult inclusion/exclusion criteria
– Historically subjective signs
– Symptoms & signs don’t correlate
• Schirmer strips and corneal staining are primary
endpoints in most clinical trials, but their diagnostic value
is limited
• Symptoms alone are insufficient to track severity
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Confidential 57
Schirmer Strip Severity Analysis
*Disease severity is calculated as an unbiased, normalized composite of seven clinical signs & symptoms
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Confidential 58
Tear Film Breakup Time (TBUT) Severity Analysis
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Confidential 59
Corneal Staining Severity Analysis
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Confidential 60
Symptoms (OSDI) Severity Analysis
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Confidential 62
Hyperosmolarity is Bad
• Hyperosmolarity is recognized as the central pathogenetic
mechanism of dry eye disease
• Hyperosmolarity is common across all forms of dry eye
disease
• Hyperosmolarity causes epithelial cell death
• Hyperosmolarity causes inflammation
• Hyperosmolarity reduces the ability of mucins to lubricate
– Loss of lubrication causes friction, which leads to wear
– Wear roughens ocular surface
– Rough ocular surface nucleates faster breakup times
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Confidential 63
Osmolarity Severity Analysis
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Confidential 64
Osmolarity is a Superior Marker of Therapeutic Efficacy
Data Courtesy Dr. Baris Sonmez, Ondokuz Mayis Universitesi
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Confidential 65
Osmolarity is a Superior Marker of Therapeutic Efficacy
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We need new diagnostic approaches to
help solve the puzzle of dry eye treatment
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Thank you for your attention
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